Display Apparatus

1. A display apparatus comprising: a substrate including a display area; a pixel circuit arranged in the display area of the substrate, the pixel circuit including: a plurality of wirings; a driving transistor; a compensation transistor; and, a first initialization transistor and an emission control transistor; and a light-emitting element connected to the pixel circuit, wherein at least one of the plurality of wirings includes a trench indented in a width direction of the at least one of the plurality of wirings.

2. The display apparatus of claim 1, further comprising a connection electrode connecting an emission control semiconductor layer of the emission control transistor to a pixel electrode of the light-emitting element, wherein the emission control semiconductor layer of the emission control transistor is connected to the connection electrode through a contact hole, and the trench is provided in a wiring including a semiconductor layer disposed between an emission control gate electrode of the emission control transistor and the contact hole.

3. The display apparatus of claim 1, wherein the trench is provided in a wiring including a semiconductor layer disposed between an emission control semiconductor layer of the emission control transistor and a driving semiconductor layer of the driving transistor.

4. The display apparatus of claim 1, wherein the trench is provided in a wiring including a semiconductor layer disposed between a compensation semiconductor layer of the compensation transistor and a first initialization semiconductor layer of the first initialization transistor.

5. The display apparatus of claim 1, wherein the trench includes a first trench and a second trench, the first trench is arranged in one side of the wiring, the second trench is arranged in another side of the wiring, and the first trench faces the second trench.

6. The display apparatus of claim 1, further comprising a connection wiring arranged inside the pixel circuit, wherein the connection wiring connects semiconductor layers apart from each other, and is disposed in a different layer from the semiconductor layers, and the trench is provided in the connection wiring.

7. The display apparatus of claim 1, further comprising: a connection electrode connecting an emission control semiconductor layer of the emission control transistor to a pixel electrode of the light-emitting element, and connected to the emission control semiconductor layer through a contact hole; and a conductive layer disposed between an emission control gate electrode of the emission control transistor and the contact hole, and spaced apart with a preset interval from the emission control gate electrode in a plan view.

8. The display apparatus of claim 1, further comprising: a connection electrode connecting an emission control semiconductor layer of the emission control transistor to a pixel electrode of the light-emitting element, and connected to the emission control semiconductor layer through a contact hole; and an inorganic insulating layer in which a first groove is defined between an emission control gate electrode of the emission control transistor and the contact hole.

9. The display apparatus of claim 1, further comprising: a connection electrode connecting an emission control semiconductor layer of the emission control transistor to a pixel electrode of the light-emitting element, and connected to the emission control semiconductor layer through a contact hole; a first lower metal layer disposed between the substrate and the emission control semiconductor layer, and overlapping an emission control gate electrode of the emission control transistor; and a second lower metal layer disposed between the substrate and the emission control semiconductor layer, and overlapping the connection electrode.

10. The display apparatus of claim 1, further comprising a bridge wiring disposed in a different layer from an emission control semiconductor layer of the emission control transistor and connected to the emission control semiconductor layer, wherein a second groove is provided in an inorganic insulating layer covering the bridge wiring, and the second groove overlaps the bridge wiring.

11. The display apparatus of claim 1, further comprising: an inorganic insulating layer arranged in the display area; and an organic insulating layer disposed between the inorganic insulating layer and the light-emitting element, wherein a third groove surrounding the pixel circuit is defined in the inorganic insulating layer, and the organic insulating layer fills the third groove.

12. A display apparatus comprising: a substrate including a display area; a pixel circuit arranged on the substrate and including: a driving transistor; a compensation transistor; a first initialization transistor; and an emission control transistor; an inorganic insulating layer arranged in the display area; a light-emitting element arranged on the inorganic insulating layer and connected to the pixel circuit; a connection electrode connecting an emission control semiconductor layer of the emission control transistor to a pixel electrode of the light-emitting element, and connected to the emission control semiconductor layer through a contact hole; and a conductive layer disposed between an emission control gate electrode of the emission control transistor and the contact hole, and spaced apart with a preset interval from the emission control gate electrode in a plan view.

13. The display apparatus of claim 12, wherein a first groove is provided in the inorganic insulating layer, and The first groove being is defined between the emission control gate electrode and the contact hole.

14. The display apparatus of claim 12, further comprising: a first lower metal layer disposed between the substrate and the emission control semiconductor layer and overlapping the emission control gate electrode; and a second lower metal layer disposed between the substrate and the emission control semiconductor layer and overlapping the connection electrode.

15. The display apparatus of claim 12, further comprising an organic insulating layer disposed between the inorganic insulating layer and the light-emitting element, wherein a third groove surrounding the pixel circuit is defined in the inorganic insulating layer, and the organic insulating layer fills the third groove.

16. The display apparatus of claim 12, wherein the pixel circuit further includes a wiring, and a trench indented in a width direction of the wiring is defined in at least a portion of the wiring disposed inside the pixel circuit.

17. The display apparatus of claim 16, wherein the trench is provided in the wiring including a semiconductor layer disposed between the emission control gate electrode and the contact hole.

18. The display apparatus of claim 16, wherein the trench is provided in the wiring including a semiconductor layer disposed between the emission control semiconductor layer of the emission control transistor and a driving semiconductor layer of the driving transistor.

19. The display apparatus of claim 16, wherein the trench is provided in the wiring including a semiconductor layer disposed between a compensation semiconductor layer of the compensation transistor and a first initialization semiconductor layer of the first initialization transistor.

20. The display apparatus of claim 16, wherein the trench includes a first trench and a second trench, the first trench is arranged in one side of the wiring, the second trench is arranged in another side of the wiring, and the first trench faces the second trench.